公开(公告)号：US20210001281A1

公开(公告)日：2021-01-07

申请号：US16976210

申请日：2019-02-28

Applicant: TORAY INDUSTRIES, INC.

Inventor： Harutoki SHIMURA ,  Takahiro TOKUYAMA ,  Yoshiki NISHIGUCHI ,  Yohei ADACHI ,  Kohei KURAOKA

IPC: B01D69/12 ,  B01D69/10 ,  B01D71/56 ,  B01D67/00 ,  B01D65/08 ,  C08G69/12 ,  C09D133/02 ,  C09D171/02

Abstract: A novel membrane is provided in which the permeate flow rate is not prone to decrease even when the membrane is used to process seawater with high salt concentration and high heavy metal ion concentration. This composite semipermeable membrane comprises a porous support layer, a separation function layer arranged on the porous support layer, and a coating layer coating the separation function layer, wherein the separation function layer contains a crosslinked polymer amide which is a condensate of polyfunctional aromatic amine and polyfunctional aromatic acid chloride, and the coating layer contains an aliphatic polymer including a polyether moiety and a carbonic acid polymer moiety.

公开(公告)号：US20210001282A1

公开(公告)日：2021-01-07

申请号：US16976198

申请日：2019-02-28

Applicant: TORAY INDUSTRIES, INC.

Inventor： Harutoki SHIMURA ,  Yoshiki NISHIGUCHI ,  Yohei ADACHI ,  Takahiro TOKUYAMA ,  Kohei KURAOKA

IPC: B01D69/12 ,  B01D71/56 ,  B01D69/02 ,  B01D67/00

Abstract: By having a coating layer, this composite semipermeable membrane has fouling resistance easily maintainable before and after contact with acid, and enables stable operation over a long period of time. This composite semipermeable membrane comprises a porous support layer, a separation function layer arranged on the porous support layer, and a coating layer arranged on the separation function layer, wherein the separation function layer contains a crosslinked aromatic polyamide which is a polycondensate of polyfunctional aromatic amines and polyfunctional aromatic acid chloride, and the coating layer contains an aliphatic polymer having the structure (I) in the description.

公开(公告)号：US20230001363A1

公开(公告)日：2023-01-05

申请号：US17772608

申请日：2020-10-30

Applicant: TORAY INDUSTRIES, INC.

Inventor： Takaaki YASUDA ,  Yohei ADACHI ,  Shinya MITSUI ,  Harutoki SHIMURA ,  Takafumi OGAWA

IPC: B01D71/82 ,  B01D69/02 ,  B01D69/10 ,  B01D69/12 ,  B01D71/56

Abstract: The present invention relates to a composite semipermeable membrane including: a support membrane including a base and a porous support layer; and a separation functional layer disposed on the porous support layer and including a crosslinked aromatic polyamide, in which the separation functional layer contains sulfo groups in an amount of 7.0×10−5 to 5.0×10−2 g/m2 and includes a structure represented by the formula 1.